Acceleration and distance travelled questions

1. The problem statement, all variables and given/known data[/b
a car traveling at 36km/h accelerates to 78km/h in 6 seconds. the brakes are applied and the car stops in a distance of 120m, draw a v/t graph and workout

The rate of acceleration? i got 6km/h please correct if this is incorrect
The distance travelled during the acceleration stage?
The time to stop the car?
If the car has a mass of 900kg. determine the increase in kinetic energy?